Translations:Kdenlive/Manual/Timeline/Editing/19/en

From KDE UserBase Wiki

Right click in the space between the clips and choose Remove Space. Be aware however that if you have clips on multiple tracks in the timeline and they are not grouped, then removing space may disturb the alignment of the clips between the different tracks — the space is only removed from the timeline where you clicked. Under this situation it may be safer to use the Spacer Tool.